2004 Chevrolet cavalier No spark
Looking for good crank sensor waveform.
Thanks Scott. Any Idea Why Mine would have a nice pattern but only 2.5 - 3 volt peaks?
Do you have injector pulse? If so, stop looking at the crank sensor and replace the ignition module. If not, check c104 for connection issues. Low amplitude is usually a result of air gap too large. The sensor being behind the starter, makes for poor visual inspection. If you could see it I would look for sensor jacking. Mike
Dave, the 2 wire inductive ckp sensor producing 2.5-3v could be normal while cranking.